Can a bad fuse box make an electric fuel pump go bad?
I own a 1997 Honda Passport. A few days ago I went to crank my car and the engine wouldn't start. It will turn, but it won't start.
So far several people have looked at the vehicle and it is an anomaly to them all. But most agree that the fuel pump is and that there's also an electrical issue. But here's my question: Couldn't the electrical issue be causing the fuel pump to go bad? From what I've read online, the answer seems to be yes. The car does use an electric fuel pump, so it would stand to reason. And one of the guys who had it for a few days trying to figure it out said that he actually got it running for about an hour but then when he messed with the fuse box under the hood the vehicle went dead again.
So I guess my real question is, what should I replace? Should I look to replace the fuse box, or should I look to replace the electric fuel pump? Or perhaps both?
PS: The vehicle WAS giving signs of a bad fuel pump before this happened, but I didn't know what it was. It would just jerk sometimes when I was driving down the street. Since all this has happened and I've been reading about fuel pumps, it seems that that is a common sign of a fuel pump going bad. BUT could the fuse box being messed up, such as perhaps shorted out, lead to the fuel pump going bad?
Sorry if this sounds complicated. I tried to put it in the easiest explanation I could. I'm not as knowledgeable about cars as I would like to be.
You should really just replace or repair the bad part unless you just want to throw money at your vehicle. You can determine if the fuse or fuse box is the problem by checking to see if you are getting 12V to the electric fuel pump. If you are not getting 12 V to the fuel pump, you need to fix that problem. If you are getting 12V to the fuel pump, most shops can determine if the fuel pump is bad with an o-scope.
The fuel pump is driven by an electric motor. The fuel pump relay is an electric switch that turns the motor on and off. The fuel pump motor has wiring to it from the cars electrical system. The wire has a fuse in the circuit. The fuse is designed to blow on high current to protect the wire and motor from burning up.
IF the fuse box has loose wiring it could affect the flow of electricity to the fuel pump motor, if the circuit is interrupted, the fuel pump won't run.
I would suspect the fuel pump relay. You can check this by using a small wire to jumper around the fuel pump relay. If the pump runs, the problem is with the relay and not the pump. Normally, the relay is inside the fuse box, so perhaps when you shake the fuel pump you are activating the relay. They fuel pump relay is cheap and it is easily plugged in and plugged out. I'd change that first and see if it corrects the problem.
Normally, if the problem is with the motor it simply will not run under any circumstances. If the pump runs at all, it is probably a relay or wiring problem and not the pump.
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